From a0d7a99439a9d4d070c5847b489222913ec2c5ce Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Adrian=20Fr=C3=BChwirth?= <bonki@users.noreply.github.com>
Date: Wed, 28 Mar 2018 15:07:03 +0200
Subject: [PATCH] COMMON: Add WARN_UNUSED_RESULT to scummsys.h

---
 common/scummsys.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/common/scummsys.h b/common/scummsys.h
index 5486ba27c662..ce54f3b50e9c 100644
--- a/common/scummsys.h
+++ b/common/scummsys.h
@@ -398,6 +398,18 @@
 	#endif
 #endif
 
+#ifndef WARN_UNUSED_RESULT
+	#if __cplusplus >= 201703L
+		#define WARN_UNUSED_RESULT [[nodiscard]]
+	#elif GCC_ATLEAST(3, 4)
+		#define WARN_UNUSED_RESULT __attribute__((__warn_unused_result__))
+	#elif defined(_Check_return_)
+		#define WARN_UNUSED_RESULT _Check_return_
+	#else
+		#define WARN_UNUSED_RESULT
+	#endif
+#endif
+
 #ifndef STRINGBUFLEN
 	#if defined(__N64__) || defined(__DS__) || defined(__3DS__)
 		#define STRINGBUFLEN 256